<template>
  <div class="star" :class="starType">
    <span v-for="itemClass in itemClasses" :class="itemClass" class="star-item"></span>
  </div>
</template>

<script type="text/ecmascript-6">
  const LENGTH = 5;
  const ON = 'on';
  const OFF = 'off';
  const HALF = 'half';
  export default {
    props: {
      size: {
        type: Number
      },
      score: {
        type: Number
      }
    },
    computed: {
      starType() {
        return 'star-' + this.size
      },
      itemClasses() {
        let result = [];
        let hasDecimal = this.score % 1 !== 0;
        let integer = Math.floor(this.score);
        for (let i = 0; i < integer; i++) {
          result.push(ON);
        }
        if (hasDecimal) {
          result.push(HALF);
        }
        while (result.length < LENGTH) {
          result.push(OFF);
        }
        return result
      },
    },
  }

</script>

<style lang="stylus" rel="stylesheet/stylus" scoped>
  @import '../../common/stylus/minix'

  .star
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
  .star-24
    .star-item
      width 10px
      height 10px
      background-size 10px 10px
      margin-left: 3px
      &:first-child
        margin-left 0
      &.on
        bg-image('star24_on')
      &.half
        bg-image('star24_half')
      &.off
        bg-image('star24_off')

  .star-36
    .star-item
      width 15px
      height 15px
      background-size 15px 15px
      margin-left: 6px
      &:first-child
        margin-left 0
      &.on
        bg-image('star36_on')
      &.half
        bg-image('star36_half')
      &.off
        bg-image('star36_off')

  .star-48
    .star-item
      width 20px
      height 20px
      background-size 20px 20px
      margin-left: 22px
      &:first-child
        margin-left 0
      &.on
        bg-image('star48_on')
      &.half
        bg-image('star48_half')
      &.off
        bg-image('star48_off')
</style>
